EP0847607B1 - Einrichtung mit optischem faserverstärker - Google Patents

Einrichtung mit optischem faserverstärker Download PDF

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Publication number
EP0847607B1
EP0847607B1 EP96934389A EP96934389A EP0847607B1 EP 0847607 B1 EP0847607 B1 EP 0847607B1 EP 96934389 A EP96934389 A EP 96934389A EP 96934389 A EP96934389 A EP 96934389A EP 0847607 B1 EP0847607 B1 EP 0847607B1
Authority
EP
European Patent Office
Prior art keywords
signal
optical
additional
gain
fibre amplifier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96934389A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0847607A1 (de
Inventor
Ulrich Kohn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0847607A1 publication Critical patent/EP0847607A1/de
Application granted granted Critical
Publication of EP0847607B1 publication Critical patent/EP0847607B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/1301—Stabilisation of laser output parameters, e.g. frequency or amplitude in optical amplifiers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
    • H01S3/10015—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by monitoring or controlling, e.g. attenuating, the input signal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S2301/00—Functional characteristics
    • H01S2301/06—Gain non-linearity, distortion; Compensation thereof

Definitions

  • the invention is based on the genus, as in the independent Claim 1 specified. At least with erbium-endowed Fiber amplifiers in multi-channel systems can addiction the gain from the performance of the optical Input signals cause changes in the performance of the optical input signal of a channel the gain of Fiber amplifier with respect to the optical signals other channel. A gain stabilization enables easier adaptation of a fiber amplifier to different circumstances.
  • pages 962 to 963 is one Method for stabilizing the gain specified by the a resonator that prefers a certain wavelength, the reinforcement is determined. Other methods are mentioned there, dealing with dynamic or automatic gain control deal.
  • the subject of the application with the features of claim 1 The following advantage: It also reveals an alternative control loop matched measurement signals and allows the Keep gain approximately constant.
  • the gain can be in certain limits can be varied; this allows the fiber amplifier easier to adapt to different system requirements.
  • isolators are on the move of optical fibers for clarity omitted. Nor is it shown how the leader is fed to the control loops.
  • In the preferred device according to Figure 1 are on Input E optical useful signals n based on a Optical fiber the input of an optical Fiber amplifier V are fed. From whose exit is an optical fiber led to the output A of the device. Part of the optical output signal of the fiber amplifier V is using a conventional optical coupler KA uncoupled and arrives at an optical filter F, the Passband the frequency and thus also Wavelength range of an additional optical signal z corresponds to that via a conventional coupler KE Useful signals n is superimposed. This preferably indicates Additional signal only one wavelength, and the filter accordingly selects as narrow a band as possible.
  • the additional signal comes from an additional device Z, the a generator G for the additional optical signal z, contains for example a laser or a laser diode.
  • the additional device Z Control device S is provided, which is controlled by a control signal s a control of the amplitude or intensity of the Generator G generated additional signal z enables.
  • Part of the additional signal z is by means of a coupler KZ coupled out and fed to a level meter P.
  • the output signal is called the measurement signal m2 and is a Measure of the power of the additional signal Z.
  • the optical filter F is followed by a measuring device for the Power of the optical signal that filter F leaves.
  • the measurement signal m1 which is the Measuring device M gives a measure of the performance of those optical signals leaving fiber amplifier V as far as they have the wavelength of the additional signal.
  • the Measurement signals m1 and m2, which are a measure of the performance of the amplified or the not yet amplified additional signal z are fed to a control element Q, which the Quotient from ml and m2 forms, which is a measure of the Gain of fiber amplifier V is.
  • the formation of quotients can preferably take place in that the control element the electrical measurement signals m1 and m2 first converted to analog / digital and then digital be processed in a processor. The result is then the control signal s, which over the Additional device Z the amplitude or intensity of the Additional signal z controls.
  • control loop described ensures that regardless of the performance of the useful signal n always so strong additional signal z in addition to the input of the Fiber amplifier V is supplied that its amplification, which is represented by the control signal s, largely remains constant.
  • FIG. 2 is a way of training Additional device Z indicated.
  • the generator G gives that Additional signal z directly to the output of the additional device Z.
  • the control signal s from FIG. 1 arrives as a reference variable to a control loop for generator G.
  • This control loop contains an optoelectric converter OE, e.g. Legs Monitor diode, whose output signal is a subtractor SU is supplied, the output signal in turn the Intensity or amplitude of the additional signal z by direct Action on the generator G controls.
  • OE optoelectric converter
  • OE e.g. Legs Monitor diode
  • the control loop shown in FIG achieved that the amplification of the additional signal z by the Fiber amplifier V is kept largely constant, regardless of what performance (within certain Limits) the useful signals of individual channels or in total to have.
  • the fiber amplifier is preferred with a operated certain degree of saturation, so that by the Regulation is achieved that maintain this degree of saturation remains, even if e.g. B. the useful signal of a channel switched off at input E within the multi-channel system becomes.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)
  • Optical Communication System (AREA)
EP96934389A 1995-09-02 1996-08-29 Einrichtung mit optischem faserverstärker Expired - Lifetime EP0847607B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19532485 1995-09-02
DE19532485A DE19532485A1 (de) 1995-09-02 1995-09-02 Einrichtung mit optischem Faserverstärker
PCT/DE1996/001594 WO1997009757A1 (de) 1995-09-02 1996-08-29 Einrichtung mit optischem faserverstärker

Publications (2)

Publication Number Publication Date
EP0847607A1 EP0847607A1 (de) 1998-06-17
EP0847607B1 true EP0847607B1 (de) 1999-12-22

Family

ID=7771139

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96934389A Expired - Lifetime EP0847607B1 (de) 1995-09-02 1996-08-29 Einrichtung mit optischem faserverstärker

Country Status (7)

Country Link
US (1) US6252699B1 (es)
EP (1) EP0847607B1 (es)
AU (1) AU7278196A (es)
DE (2) DE19532485A1 (es)
ES (1) ES2142617T3 (es)
GR (1) GR3032923T3 (es)
WO (1) WO1997009757A1 (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19838788A1 (de) * 1998-08-26 2000-03-09 Siemens Ag Geregelter optischer Verstärker
US6563614B1 (en) * 1999-05-21 2003-05-13 Corvis Corporation Optical transmission system and amplifier control apparatuses and methods
DE60036774T2 (de) * 1999-07-30 2008-07-24 Mitsubishi Denki K.K. Optischer verstärkungswiederholer und optischer verstärkungswiederholer und übertragungsanordnung
US7170673B2 (en) 1999-07-30 2007-01-30 Mitsubishi Denki Kabushiki Kaisha Optical amplifying repeater apparatus and optical amplifying/repeating transmission system
US6498677B1 (en) * 2000-10-23 2002-12-24 Onetta, Inc. Optical amplifier systems with transient control
US6907195B2 (en) * 2001-08-28 2005-06-14 Dorsal Networks, Inc. Terminals having sub-band substitute signal control in optical communication systems
US6944399B2 (en) * 2001-08-28 2005-09-13 Dorsal Networks, Inc. Methods of signal substitution for maintenance of amplifier saturation
US8705978B2 (en) * 2011-06-20 2014-04-22 Futurewei Technologies, Inc. Method of efficiently and safely adding and deleting channels in an amplified wavelength division multiplexing system

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU777346A1 (ru) * 1977-12-23 1980-11-07 Государственный Научно-Исследовательский Энергетический Институт Им. Г.М. Кржижановского Парогенератор
EP0305995B1 (en) * 1987-09-01 1993-11-03 Nec Corporation An optical amplifying repeater
GB2230912B (en) * 1989-04-22 1993-10-20 Stc Plc Optical amplifier gain control
JPH03219686A (ja) * 1990-01-24 1991-09-27 Mitsubishi Electric Corp ファイバ形光増幅器
JPH04361583A (ja) * 1991-06-10 1992-12-15 Oki Electric Ind Co Ltd 光増幅度安定化方式
JPH0595156A (ja) * 1991-10-01 1993-04-16 Sumitomo Cement Co Ltd 光フアイバ−増幅器
JPH05145162A (ja) * 1991-11-25 1993-06-11 Sumitomo Electric Ind Ltd フアイバアンプ
JP2728157B2 (ja) * 1992-01-28 1998-03-18 日本電信電話株式会社 光増幅器
US5500756A (en) * 1992-02-28 1996-03-19 Hitachi, Ltd. Optical fiber transmission system and supervision method of the same
JPH0677573A (ja) * 1992-08-27 1994-03-18 Ando Electric Co Ltd 光ａｇｃ回路
JP2546499B2 (ja) * 1993-06-28 1996-10-23 日本電気株式会社 光信号直接増幅器
GB2280560B (en) * 1993-07-31 1997-09-03 Northern Telecom Ltd Communications system
US5374973A (en) * 1993-09-21 1994-12-20 Alcatel Network Systems, Inc. Optical amplifier
JP3012760B2 (ja) * 1993-10-25 2000-02-28 三菱電機株式会社 光増幅器及び分配システム及びローカル・エリア・ネットワーク及び利得制御方法
FR2714982B1 (fr) * 1994-01-13 1996-02-02 Alcatel Nv Amplificateur optique régulé.
JPH0837497A (ja) * 1994-05-20 1996-02-06 Fujitsu Ltd 光増幅器及び光送信装置

Also Published As

Publication number Publication date
US6252699B1 (en) 2001-06-26
ES2142617T3 (es) 2000-04-16
EP0847607A1 (de) 1998-06-17
WO1997009757A1 (de) 1997-03-13
DE19532485A1 (de) 1997-03-06
DE59603991D1 (de) 2000-01-27
GR3032923T3 (en) 2000-07-31
AU7278196A (en) 1997-03-27

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